//
//  HLCycleImages.m
//  06-CycleImages
//
//  Created by 李昊林 on 16/7/21.
//  Copyright © 2016年 李昊林. All rights reserved.
//

#import "HLCycleImages.h"

@interface HLCycleImages()<UIScrollViewDelegate>
@property (nonatomic, strong) UIScrollView *cycleScrollView;
@property (nonatomic, strong) UIPageControl *imagesPage;
@end

@implementation HLCycleImages
-(void)scrollViewDidEndDecelerating:(UIScrollView *) scrollView {
    NSInteger page = scrollView.contentOffset.x / self.bounds.size.width;_imagesPage.currentPage = page - 1;
    
    //_imagesPage.currentPage = scrollView.contentOffset.x / self.bounds.size.width;
    if (page == 0) {
        _cycleScrollView.contentOffset = CGPointMake(self.bounds.size.width * (_imageArray.count) - 2, 0);
        _imagesPage.currentPage = _imageArray.count - 3;
        
    } else if (page == _imageArray.count - 1) {
        _cycleScrollView.contentOffset = CGPointMake(self.bounds.size.width, 0);
    }

}

#pragma mark - init
- (instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        // 初始化中属性赋值得使用下划线_,不能使用self
        // 子控件初始化时子控件不要和初始化的frame一样,应该用bounds/CgRectMake(0, 0, width, height);
        
        [self initScrollView:frame];
        [self initImagePage:frame];
    }
    return self;
}

- (void)initScrollView:(CGRect)frame{
    _cycleScrollView = [[UIScrollView alloc] initWithFrame:self.bounds];
    _cycleScrollView.backgroundColor = [UIColor blackColor];
    
    _cycleScrollView = [[UIScrollView alloc]initWithFrame:self.bounds];
    //_cycleScrollView.pagingEnabled = YES;
    _cycleScrollView.bounces = NO;
    _cycleScrollView.delegate = self;
    _cycleScrollView.showsHorizontalScrollIndicator = NO;
[self addSubview:_cycleScrollView];
}
#warning 后期需要添加page的位置改变,这里的默认位置
- (void)initImagePage:(CGRect)frame{
    _imagesPage = [[UIPageControl alloc] initWithFrame:CGRectMake(0, 0, frame.size.width / 3, 20)];
    _imagesPage.numberOfPages = 5;
    _imagesPage.center = CGPointMake(frame.size.width / 2, frame.size.height - 30 / 2);
    [self addSubview:_imagesPage];
    [_imagesPage addTarget:self action:@selector(imagesWithChange:) forControlEvents:UIControlEventEditingChanged];
    
}
//如何通过PAgeControl进行轮播
- (void)imagesWithChange:(UIPageControl *)pageControl {
    [_cycleScrollView setContentOffset:CGPointMake((pageControl.currentPage+1) *self.bounds.size.width, 0) animated:YES];
}
#pragma mark - ImagesArray
//自定义方法
- (void)setImagesArrayWithArray:(NSArray *)array {
    
    NSArray *imagesArray = [self handleArray:array];
    // 逻辑判断时， 需要用到数组内容
    self.imageArray = imagesArray;
    // 直接使用数组创建ImageView
    for (int i = 0; i < imagesArray.count; i++) {
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(i * self.bounds.size.width, 0, self.bounds.size.width, self.bounds.size.height)];
        imageView.image = imagesArray[i];
        [_cycleScrollView addSubview:imageView];
    }
    
    _imagesPage.numberOfPages = array.count;
    
    _cycleScrollView.contentSize = CGSizeMake(imagesArray.count * self.bounds.size.width, 0);
    //应为添加了最后一张图， 要让轮播图看起来在第一张
    _cycleScrollView.contentOffset = CGPointMake(self.bounds.size.width, 0);
}

- (NSArray *)handleArray:(NSArray *)array {
    //  判断类型，（不知道别人使用你的类的时候传进来的类型是什么）
    id firstObject = [array firstObject];
    // 最终的图片数组
    NSMutableArray *imagesArray = [NSMutableArray array];
    // 判断对象是不是某种类型
    if ([firstObject isKindOfClass:[NSString class]]) {
        // 把字符串数组 转换 成UIImage数组
        for (NSString *imageName in array) {
            UIImage *image = [UIImage imageNamed:imageName];
            [imagesArray addObject:image];
        }
    } else if ([firstObject isKindOfClass:[UIImage class]]) {
        [imagesArray setArray:array];
    }
    //获取到第一张图
    UIImage *firstImage = [imagesArray firstObject];
    //获取到最后一张图
    UIImage *lastImage = [imagesArray lastObject];
    // 将最后一张图放入下标为0的位置
    [imagesArray insertObject:lastImage atIndex:0];
    //  在最后添加第一张图
    [imagesArray addObject:firstImage];
    
    return [imagesArray copy];
}

- (void)creatAllImageViewWithImagesArray:(NSArray *)imagesArray {
    
}

@end